Question: A researcher reports that the mean difference in response time to an auditory versus a visual cue is 0.83 s, with a pooled sample variance

A researcher reports that the mean difference in response time to an auditory versus a visual cue is 0.83 s, with a pooled sample variance equal to 2.45. What is the effect size for this test using estimated Cohen's d?

a.d = 0.53; large effect size

b.d = 0.53; medium effect size

c.d = 0.34; small effect size

d.d = 0.34; medium effect size

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